Gas-burner.



. PATENTED MAY 12, 1903. O. M. ARMSTRONG.

GAS BURNER. APPLICATION PILED M'AR- 21, 1902.

NO MODEL.

UNITED STATES Patented. May 12, 19031 CHARLES MARTIN ARMSTRONG, OF TORONTO, OANADA.

GAS-BURNER.

SPECIFICATION forming part of Letters Patent No. 727,873, dated May 12, 1903. Application filed March 21, 1902. Serial No. 99,280. (No model.)

To aZZ whom it may concern.-

Be it known that I, CHARLES MARTIN ARM- STRONG, manufacturer, of the city of Toronto, in the county of York, Province of Ontario, Canada, have invented certain new and useful Improvements in Gas-Burners, of which the following is a specification.

My invention relates to improvements in gas-burners; and the object of my invention is to design a gas-burner by means of which I eliminate all unnecessary friction of the gas against the gas-burner, so as to enable me to get a strong current of mixture therefrom, so that I may get the maximum amount of light from any incandescent mantle I may use with my burner.

Another object of my invention is to inter nally provide the outer end of the gas burner with ordinary screw-threads made at an obtuse angle to the longitudinal axis of said gasburner, so that portion of the mixture will be spread thereby.

Another object of my invention is to design a gas-conduit so that the gas passing therefrom can by means of same be made to come only in contact with the outer end of the gasburner.

My gas-burner consists, essentially, of a suitable airchamber having a gasburner opening from the end thereof, which gasburner is preferably internally provided with a screw-thread near its outer end designed to perform the function of a spreader, combined with a gas-conduit of particular construction, as hereinafter more particularly explained.

Figure 1 is a general perspective view of the preferred form of my gas-burner. Fig. 2 is a longitudinal vertical section through Fig. 1. Fig. 2* is a Vertical section on the line a b, Fig. 2, showing, however, both sides of the construction. Fig. 3 is a side elevation, on a reduced scale, of my gas-burner, showing an ordinary incandescent mantle combined with same. i

In the drawings like letters of referenceindicate corresponding parts in each figure.

A is the air-chamber, in the outer end of which is the burner B. p

O is the gas-conduit, supported in the airchamber by any suitable support D, secured to or forming part of said air-chamber. The inner end of the gas-conduit O is provided with a long passage-way E, circular in crosssection, which is on a line with the 1ongitudinal axis of the burner 13, as shown in Fig. 2. The main passage-way F in the gas-conduit is very much larger thanv the passageway E in its inner end. By so constructing the gas-conduit I am enabled to increase the pressure of the gas within the passage-way F, so that same will pass from the passage-wayE in a strong current. When the gas escapes from the passage-way E, it passes through the space G in the air-chamber A, where it first comes in contact with the air. I internally provide the burner B with any suitable screwthread from its outer end, a short distance inwardly therefrom, so that the. gas from the passage-way E will come in contact with said screw-thread, and thus portion of samebe retarded in its flow. I am aware that difierent devices have been used for revolving the mixture of gas and air; but as the screw-threads I use are at an obtuse angle to the longitudinal axis of the burner B they do not revolve the mixture. If I could so construct the screw-threads that they would be at right angles to the longitudinal axis of said burner, the gas would be just as well spread by same. From my knowledge of the state of the art I am aware that various devices for spreading the mixture have been used in connection with gas-burners. From the construction of all these spreadersit will be understood that the mixture as it passes from the gas-burner is equally retarded at all points on a crosssection. Consequently only one current of the mixture passes from the gas-burner. The length of the passage-way E must be in proportion to the length of the gas-burner B, and the outer end of thepassageway E must be a certain distance from the outer end of the gas burner. These measurements will of course vary with the size of the device. By means of the passageway E, I am enabled to project the gas into the gas-burner B so that it will only come in contact with said gasburner near its outer end. From this it will be seen that I do not unnecessarily weaken the force of the gas by unnecessary friction of same against the sides of the gas-burner B. Now, as before stated, the objectof the screw-threads in the gas-burner B is to perform the function of a spreader, so that the mixture will sufficiently come in contact with the sides of the mantle I. It will be understood that only portion of the gas-that is to say, the gas which comes in contact with the screw-threads in the end of the burner 13- will be retarded in its movement and more or less under greater pressure, so that it will burst from the end of the gas-burner, so as to spread out and come in contact with the whole surface of the mantle. As the stream of gas is projected in a strong current from the passage-way E into the gas-burner B it causes a current of air to flow in its direction of movement, and when the gas comes in contact with the screw-threads in the outer end of the gas-burner B the gas and air are intition, as it does not come in contact with the screw threads, passes in a strong current from the gas-burner up into the mantle I for its whole length and heats same, so that same will give off its maximum amount of light. On referring to Fig. 3 the mantle I is shown supported by any suitable frame J over and above the burner B.

If desired, the gas-conduit C may be adjustably held in any suitable support D by any suitable means, such as a set-screw O.

The shape of the air-chamber is immaterial; but I preferably construct same bellshaped and without any sharp corners that would be apt to retard the flow of air therethrough.

By making the passage-way E circular in cross-section, approximately one thirty-second of an inch in diameter and one-half of an inch in length, I get the best results from a burner of about the size shown in the drawings.

From the present practice of supporting mantles in relation to the gas-burner a great deal of heat is conveyed away from the mantle because of its contact with the gas-burner. From the manner in which I support my mantle, so that same will not come in contact with the gas-burner, it will be seen that I prevent the conduction of heat from the mantie into the gas-burner, and consequently utilize all the heat in the mantle to give oif light. As far as I am aware, no other mantles are supported in this manner. Another advantage I gain by so supporting my mantles is the reducing to a minimum the danger of breaking said mantles. As a strong center current of mixture passes from the gas-burner right through the mantle, from top to bottom of same, it will be seen that the mantle is prevented from swaying and swinging by reason of this said central current of gas, which really acts as a longitudinal support to the mantle.

From this specification it will be seen that as I render the mantles I use incandescent from top to bottom, thus enabling the mantle to give off its maximum amount of light, I reduce the cost of lighting.

It will be noticed that the inner end of the burner B is preferably flush with the end of the air-chamber A, so as to prevent any possibility of dead-air pockets-that is, corners or spaces where a draft could not readily be created.

It will of course be understood that the burner B is straight for its whole length.

WVhat I claim as my invention, and desire to secure by Letters Patent, is-- 1. In a device of the class described, the combination with an air-chamber, and a gasburner which opens from the end thereof, of a gas-conduit held in said air-chamber, provided with a passage-way in its delivery end smaller than the main passage-way in said gas-conduit, the said small passage-way being circular in cross-section and on a line with the longitudinal axis of said gas-burner; the said small passage-way being of uniform bore throughout and of the length that will project the current of gas passing therefrom up into the gas-burner so that it will come only in contact with same near its outer end.

2. In a device of the class described, the combination with an air-chamber, and a gasburner which opens from the end thereof, the said gas-burner being internally provided with an ordinary screw-thread at its outer end extending a short distance inwardly therefrom, of a gasconduit held in said airchamber provided with a passage-way in its delivery end smaller than the main passageway in said gas-conduit, the said small passage-way being circular in cross-section and on a line with the longitudinal axis of said gas-burner; the said small passage-way being of uniform bore throughout and of the length that will project the current of gas passing therefrom up into the gas-burner so that it will come only in contact with the upper end of said gas-burner which is provided with the said screw-threads, as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CHARLES MARTIN ARMSTRONG.

WVitnesses:

EDGERTON R. CASE, FRANK GERRY. 

